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    CVE-2026-107284

    The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 and 2.16.1, WebSocketHandler.upgrade aborts a handshake whose Sec-WebSocket-Accept value is missing or invalid but continues into pipeline installation and onOpen delivery. Frames coalesced with the invalid 101 response can be decoded and delivered from a peer that did not prove the handshake, although the request future fails and the channel closes. This issue is fixed in versions 3.0.12 and 2.16.1.

    Published:Oct 7, 2026
    Last Modified:Oct 9, 2026
    EPS:Oct 7, 2026
    EPSS Score:0.00138
    CVSS Score:3.7

    Affected Products

    Vendor
    Asynchttpclient Project
    Product
    Async-http-client

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-102740 (CVSS 5.8) — The AsyncHttpClient library allows Java applications to execute HTTP requests and asynchronously process HTTP …
    CVE-2026-107226 (CVSS 6.8) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …
    CVE-2026-107285 (CVSS 5.9) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …
    CVE-2026-107283 (CVSS 3.7) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …
    CVE-2026-107282 (CVSS 9.4) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …
    CVE-2026-107281 (CVSS 7.6) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …
    CVE-2026-107280 (CVSS 6.9) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …
    CVE-2026-107279 (CVSS 8.8) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …
    CVE-2026-107232 (CVSS 7.5) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …
    CVE-2026-107231 (CVSS 8.7) — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High